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NPZ TAL-200k Service Manual

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TELESCOPE TAЛ-200K
Service manual


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Summary of Contents for NPZ TAL-200k

  • Page 1 TELESCOPE TAЛ-200K Service manual...

  • Page 2: Table Of Contents

    CONTENTS Page . General directions 2. Specifications 3. Standard equipment 4. Design and principle 5. Optical train 6. Preparation for operation 6.. Telescope assembling 6.2. Telescope balancing 6.3. Precautionary measures 7. Order of operation 7.. Operation with telescope 7.2. Photographic observations 7.3.

  • Page 3: General Directions

    1. GENERAL DIRECTIONS ATTENTION! Telescope TAЛ-200K (hereinafter in the text referred to as «telescope») is not intended for direct visual observation of Sun at full operating aperture. Because of high light intensity an image of Sun in focus of primary mirror has a high temperature.

  • Page 4: Specifications

    2. SPECIFICATIONS Diameter of objective lens (operating aperture), mm Focal length, mm 2000 Relative aperture :0 Magnification and angle field of view (changeable): - with the eyepiece f’=25 mm 3.3′ - with the eyepiece f’=0 mm 2.5′ - with the eyepiece f’=25 mm and Barlow lens 5.4′...

  • Page 5: Standard Equipment

    3. STANDARD EQUIPMENT Name Telescope Supply unit Eyepiece of f’=25mm Finderscope Equatorial mounting Supports Tripod Pier Bundled conductors Higned clips Control panel Cable for car mains Accessories and Parts Eyepiece of f’=0 mm Barlow lens Reticle Black light filter (solar) Neutral light filter (gray, lunar) Blind Bushing...
  • Page 6 Fig.. General view:  - telescope tube; 2 - equatorial mounting; 3 - pier; 4 - supports; 5 - supply unit; 6 - bundled conductor; 7 - control panel; 8 - eyepiece set; 9 - finderscope...
  • Page 7 Fig. 2. General view of telescope mounted on tri pod: ,2 - stoppers; 3 - table...

  • Page 8: Design And Principle

    4. DESIGN AND PRINCIPLE The telescope (fig., 2) consists of three basic units such as the telescope tube, equatorial mounting, pier with supports or tripod and supply unit. The tube 1 (fig.) is the basic part of the telescope, which embodies the optical units such as a primary mirror, corrector, eyepiece set and finderscope.
  • Page 9 The corrector (fig.4) consists of secondary mirror 2 and meniscus lens 3 spaced by means of padding rings 4 in the mounting . The corrector is adjustable on the ball hinge 5,6 by means of adjusting screws 7. The Corrector: Fig.
  • Page 10 corrector assembly is mounted in the telescope tube. Eyepiece set (fig.3) consists of focussing mechanism, diagonal mirror, set of symmetrical eyepieces f'=25mm and f'=0mm fixed in the mounting of 3.8mm (.25”), Barlow lens mounted in the same one. Finderscope 9 (fig.) is a telescope with 8 magnification and view field 7°.
  • Page 11 Fastened on one end of the declination axis is the saddle with hinged clips in which the telescope tube is mounted; fastened on the other end of the axis is the counterweights  which can move along the axis for balancing the telescope tube. The casing of the polar axis is fastened on the bracket 3 provided with a scale of latitudes with the help of handle 2.
  • Page 12 Fig. 6. Control Panel:  - indicator; 2 - speed selection buttons; 3 - correction buttons; 4 - lighting button; 5 - plug...

  • Page 13: Optical Train 3

    5. OPTICAL TRAIN Telescope TAЛ-200K is developed on the basis of Klevzov’s original optical train, which does not use any aspherical surfaces. Klevzov’s optical train (fig. 7) consists of primary concave mirror  and correcting unit consisting of two single lenses 4,5. The lens 4 is made in form of negative meniscus directed by concave side to the observed object.
  • Page 14 The lacks of aspherical surfaces, high quality of correction of the residual aberration in the wide range of spectrum and small length are indisputable advantages of Klevzov’s optical system. The telescope has a possibility to achieve that to allow satisfying all requirements of amateur astronomer. Telescope is completed with two symmetrical eyepieces f'=25mm and f' = 0 mm and 2 Barlow lens.

  • Page 16: Preparation For Operation 6

    6. PREPARATION FOR OPERATION 6.1. Telescope assembling Prior to assembling the units and parts should be cleaned from the sluicing compound of the plant. The telescope is assembled in the following way. Three supports provided with captive screws are fixed to the lower end of the pier through holes.

  • Page 17: Telescope Balancing 6

    6.2. Telescope balancing For smooth motion of the telescope and reliable operation of the slow motion knob it is important to balance its movable parts on the axes of the equatorial mounting. For this purpose one should set the telescope tube in the horizontal position of the declination axis.
  • Page 18 Fig. 9. Watch drive:  - worm gear wheel; 2 - cap; 3 - screw; 4 - handwheel; 5 -screw; 6 - screw; 7 - drive; 8 - screw; 9 - worm with gear wheel; 0 - worm wheel;  - cover; 2 - screw; 3 - cover...

  • Page 19: Order Of Operation 9

    7. ORDER OF OPERATION 7.1. Operation with telescope Before mounting the telescope it is required to choose a place and prepare a site. It must be even and solid. Mount the telescope on the site and check it for reliable stability. For pointing to an object the telescope should be rotated about two axes.
  • Page 20 indicator  blinks. If the button 3 is released the tracking speed returns to the nominal. The telescope has high magnifications and, hence, small fields of view, therefore it is provided with a finderscope. After mounting the telescope it is necessary to set parallel of the optical axes of the telescope tube and finderscope.

  • Page 21: Photographic Observations

    For setting the declination circle fixed on the declination axis one should find the declination of two-three bright stairs in the star catalogue or make use of the declinations of the planets. With the help of the finderscope one brings the star or the planet to the center of the field of view of the telescope at maximum magnification.

  • Page 22: Telescope And Atmospheric Conditions

    7.3. Telescope and atmospheric conditions Telescope has a high magnification. In this case one should remember the following feature. When increasing a magnification of telescope a distortion of image to be made by aerial heterogeneity becomes more visible. It is a scintillation and distortion of image of remoted objects, scintillation and distortion of image of stars, reduction of sharpness of small parts of Moon and stars.

  • Page 23: Maintenance

    8. MAINTENANCE For faultless operation the telescope should be kept in cleanness and protected against mechanical damage. The metal surfaces are periodically cleaned by using clean soft napkins, then wiped with a napkin impregnated with acidless vaseline, after that with a dry napkin. The aluminized mirrors require particular care.

  • Page 24: Rules Of Storage

    9. RULES OF STORAGE It is recommended practice to store the telescope in the heated room with the relative humidity of maximum 80% at the temperature from 5 to 40° C. It is recommended to avoid any strokes and shakes. It is forbidden to store any acid, alkali and materials educing moisture or chemical active gas and streams.

  • Page 25: Image Quality Of The Telescope

    SUPPLEMENT Table of close stellar pairs for testing image quality of the telescope Coordinates Visible Name ang. Magnitude, distance, Constellations of star degrees, h, m ang. s. ang. min. αPsc 59.4 3’ 4.3-5.3 .9’’ Pisces ° γCet 40.7 02’ 3.4-4.4 2.8’’...

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